Why... and what... is causing my mom and everyone else to have a new daily chronic dry cough after a lad stent angioplasty in June. When will it go away. M.D s ignore everyone, don t explain anythingand make bogus suggestions, recommending xantac or cough medicine,etc. .she and all the others don t have allergies and don t need more medicine.my mom is scared with this new cough. All the reviews complain of a dry cough so what is it caused by